"I've always had a close affiliation with ZB. I've loved working there over the years. I can't wait to get back on air hosting my own show."
Hawkesby, who is married to Newstalk ZB's Mike Hosking, started her news career at TVNZ in 1995 reporting, presenting and news reading.
More recently, she has worked across many Newstalk ZB shows including The Mike Hosking Breakfast, Saturdays with Jack Tame and Andrew Dickens Sunday Café, and is a columnist for Woman's Day.
Kate Hawkesby's first day on Early Edition - which airs from 5am to 6am - will be January 22, 2018.
Current Early Edition host Rachel Smalley earlier this month announced she was leaving ZB at the end of the year.